Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b7248a02a222dc0b60b6c3883d232bfcdad2ec712611a1f9be6d613a465811f' 
  AND token = 'YoTIHfPs9lNYflvpD1BGW/qxNo/M+6XLujvS6rHI0u0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}